/* $OpenBSD: ieee80211_ioctl.c,v 1.19 2007/07/18 18:10:31 damien Exp $ */
/* $NetBSD: ieee80211_ioctl.c,v 1.15 2004/05/06 02:58:16 dyoung Exp $ */
/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* IEEE 802.11 ioctl support
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/systm.h>
#include <sys/endian.h>
#include <sys/proc.h>
#include <sys/tree.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/if_media.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_ioctl.h>
void ieee80211_node2req(struct ieee80211com *,
const struct ieee80211_node *, struct ieee80211_nodereq *);
void ieee80211_req2node(struct ieee80211com *,
const struct ieee80211_nodereq *, struct ieee80211_node *);
void
ieee80211_node2req(struct ieee80211com *ic, const struct ieee80211_node *ni,
struct ieee80211_nodereq *nr)
{
/* Node address and name information */
IEEE80211_ADDR_COPY(nr->nr_macaddr, ni->ni_macaddr);
IEEE80211_ADDR_COPY(nr->nr_bssid, ni->ni_bssid);
nr->nr_nwid_len = ni->ni_esslen;
bcopy(ni->ni_essid, nr->nr_nwid, IEEE80211_NWID_LEN);
/* Channel and rates */
nr->nr_channel = ieee80211_chan2ieee(ic, ni->ni_chan);
nr->nr_chan_flags = ni->ni_chan->ic_flags;
nr->nr_nrates = ni->ni_rates.rs_nrates;
bcopy(ni->ni_rates.rs_rates, nr->nr_rates, IEEE80211_RATE_MAXSIZE);
/* Node status information */
nr->nr_rssi = (*ic->ic_node_getrssi)(ic, ni);
nr->nr_max_rssi = ic->ic_max_rssi;
bcopy(ni->ni_tstamp, nr->nr_tstamp, sizeof(nr->nr_tstamp));
nr->nr_intval = ni->ni_intval;
nr->nr_capinfo = ni->ni_capinfo;
nr->nr_fhdwell = ni->ni_fhdwell;
nr->nr_fhindex = ni->ni_fhindex;
nr->nr_erp = ni->ni_erp;
nr->nr_pwrsave = ni->ni_pwrsave;
nr->nr_associd = ni->ni_associd;
nr->nr_txseq = ni->ni_txseq;
nr->nr_rxseq = ni->ni_rxseq;
nr->nr_fails = ni->ni_fails;
nr->nr_inact = ni->ni_inact;
nr->nr_txrate = ni->ni_txrate;
nr->nr_state = ni->ni_state;
/* Node flags */
nr->nr_flags = 0;
if (bcmp(nr->nr_macaddr, nr->nr_bssid, IEEE80211_ADDR_LEN) == 0)
nr->nr_flags |= IEEE80211_NODEREQ_AP;
if (ni == ic->ic_bss)
nr->nr_flags |= IEEE80211_NODEREQ_AP_BSS;
}
void
ieee80211_req2node(struct ieee80211com *ic, const struct ieee80211_nodereq *nr,
struct ieee80211_node *ni)
{
/* Node address and name information */
IEEE80211_ADDR_COPY(ni->ni_macaddr, nr->nr_macaddr);
IEEE80211_ADDR_COPY(ni->ni_bssid, nr->nr_bssid);
ni->ni_esslen = nr->nr_nwid_len;
bcopy(nr->nr_nwid, ni->ni_essid, IEEE80211_NWID_LEN);
/* Rates */
ni->ni_rates.rs_nrates = nr->nr_nrates;
bcopy(nr->nr_rates, ni->ni_rates.rs_rates, IEEE80211_RATE_MAXSIZE);
/* Node information */
ni->ni_intval = nr->nr_intval;
ni->ni_capinfo = nr->nr_capinfo;
ni->ni_fhdwell = nr->nr_fhdwell;
ni->ni_fhindex = nr->nr_fhindex;
ni->ni_erp = nr->nr_erp;
ni->ni_pwrsave = nr->nr_pwrsave;
ni->ni_associd = nr->nr_associd;
ni->ni_txseq = nr->nr_txseq;
ni->ni_rxseq = nr->nr_rxseq;
ni->ni_fails = nr->nr_fails;
ni->ni_inact = nr->nr_inact;
ni->ni_txrate = nr->nr_txrate;
ni->ni_state = nr->nr_state;
}
int
ieee80211_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ieee80211com *ic = (void *)ifp;
struct ifreq *ifr = (struct ifreq *)data;
int i, error = 0;
struct ieee80211_nwid nwid;
struct ieee80211_nwkey *nwkey;
struct ieee80211_power *power;
struct ieee80211_bssid *bssid;
struct ieee80211chanreq *chanreq;
struct ieee80211_channel *chan;
struct ieee80211_txpower *txpower;
struct ieee80211_key keys[IEEE80211_WEP_NKID];
static const u_int8_t empty_macaddr[IEEE80211_ADDR_LEN] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
struct ieee80211_nodereq *nr, nrbuf;
struct ieee80211_nodereq_all *na;
struct ieee80211_node *ni;
u_int32_t flags;
switch (cmd) {
case SIOCSIFADDR:
case SIOCGIFADDR:
error = ether_ioctl(ifp, &ic->ic_ac, cmd, data);
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
break;
case SIOCS80211NWID:
if ((error = suser(curproc, 0)) != 0)
break;
if ((error = copyin(ifr->ifr_data, &nwid, sizeof(nwid))) != 0)
break;
if (nwid.i_len > IEEE80211_NWID_LEN) {
error = EINVAL;
break;
}
memset(ic->ic_des_essid, 0, IEEE80211_NWID_LEN);
ic->ic_des_esslen = nwid.i_len;
memcpy(ic->ic_des_essid, nwid.i_nwid, nwid.i_len);
error = ENETRESET;
break;
case SIOCG80211NWID:
memset(&nwid, 0, sizeof(nwid));
switch (ic->ic_state) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
nwid.i_len = ic->ic_des_esslen;
memcpy(nwid.i_nwid, ic->ic_des_essid, nwid.i_len);
break;
default:
nwid.i_len = ic->ic_bss->ni_esslen;
memcpy(nwid.i_nwid, ic->ic_bss->ni_essid, nwid.i_len);
break;
}
error = copyout(&nwid, ifr->ifr_data, sizeof(nwid));
break;
case SIOCS80211NWKEY:
if ((error = suser(curproc, 0)) != 0)
break;
nwkey = (struct ieee80211_nwkey *)data;
if ((ic->ic_caps & IEEE80211_C_WEP) == 0 &&
nwkey->i_wepon != IEEE80211_NWKEY_OPEN) {
error = EINVAL;
break;
}
/* check and copy keys */
memset(keys, 0, sizeof(keys));
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
keys[i].k_len = nwkey->i_key[i].i_keylen;
/*
* Limit the maximal allowed key size to
* IEEE80211_KEYBUF_SIZE bytes.
*/
if (keys[i].k_len > sizeof(keys[i].k_key)) {
error = EINVAL;
break;
}
if (keys[i].k_len <= 0)
continue;
if ((error = copyin(nwkey->i_key[i].i_keydat,
keys[i].k_key, keys[i].k_len)) != 0)
break;
}
if (error)
break;
i = nwkey->i_defkid - 1;
if (i < 0 || i >= IEEE80211_WEP_NKID ||
keys[i].k_len == 0 ||
(keys[i].k_len == -1 && ic->ic_nw_keys[i].k_len == 0)) {
if (nwkey->i_wepon != IEEE80211_NWKEY_OPEN) {
error = EINVAL;
break;
}
} else
ic->ic_wep_txkey = i;
/* save the key */
if (nwkey->i_wepon == IEEE80211_NWKEY_OPEN)
ic->ic_flags &= ~IEEE80211_F_WEPON;
else
ic->ic_flags |= IEEE80211_F_WEPON;
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
struct ieee80211_key *k = &ic->ic_nw_keys[i];
if (keys[i].k_len < 0)
continue;
if (keys[i].k_len == 0)
k->k_cipher = IEEE80211_CIPHER_NONE;
else if (keys[i].k_len <= 5)
k->k_cipher = IEEE80211_CIPHER_WEP40;
else
k->k_cipher = IEEE80211_CIPHER_WEP104;
k->k_len = keys[i].k_len;
memcpy(k->k_key, keys[i].k_key, sizeof(keys[i].k_key));
}
error = ENETRESET;
break;
case SIOCG80211NWKEY:
nwkey = (struct ieee80211_nwkey *)data;
if (ic->ic_flags & IEEE80211_F_WEPON)
nwkey->i_wepon = IEEE80211_NWKEY_WEP;
else
nwkey->i_wepon = IEEE80211_NWKEY_OPEN;
nwkey->i_defkid = ic->ic_wep_txkey + 1;
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
if (nwkey->i_key[i].i_keydat == NULL)
continue;
/* do not show any keys to non-root user */
if ((error = suser(curproc, 0)) != 0)
break;
nwkey->i_key[i].i_keylen = ic->ic_nw_keys[i].k_len;
if ((error = copyout(ic->ic_nw_keys[i].k_key,
nwkey->i_key[i].i_keydat,
ic->ic_nw_keys[i].k_len)) != 0)
break;
}
break;
case SIOCS80211POWER:
if ((error = suser(curproc, 0)) != 0)
break;
power = (struct ieee80211_power *)data;
ic->ic_lintval = power->i_maxsleep;
if (power->i_enabled != 0) {
if ((ic->ic_caps & IEEE80211_C_PMGT) == 0)
error = EINVAL;
else if ((ic->ic_flags & IEEE80211_F_PMGTON) == 0) {
ic->ic_flags |= IEEE80211_F_PMGTON;
error = ENETRESET;
}
} else {
if (ic->ic_flags & IEEE80211_F_PMGTON) {
ic->ic_flags &= ~IEEE80211_F_PMGTON;
error = ENETRESET;
}
}
break;
case SIOCG80211POWER:
power = (struct ieee80211_power *)data;
power->i_enabled = (ic->ic_flags & IEEE80211_F_PMGTON) ? 1 : 0;
power->i_maxsleep = ic->ic_lintval;
break;
case SIOCS80211BSSID:
if ((error = suser(curproc, 0)) != 0)
break;
bssid = (struct ieee80211_bssid *)data;
if (IEEE80211_ADDR_EQ(bssid->i_bssid, empty_macaddr))
ic->ic_flags &= ~IEEE80211_F_DESBSSID;
else {
ic->ic_flags |= IEEE80211_F_DESBSSID;
IEEE80211_ADDR_COPY(ic->ic_des_bssid, bssid->i_bssid);
}
if (ic->ic_opmode == IEEE80211_M_HOSTAP)
break;
switch (ic->ic_state) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
error = ENETRESET;
break;
default:
if ((ic->ic_flags & IEEE80211_F_DESBSSID) &&
!IEEE80211_ADDR_EQ(ic->ic_des_bssid,
ic->ic_bss->ni_bssid))
error = ENETRESET;
break;
}
break;
case SIOCG80211BSSID:
bssid = (struct ieee80211_bssid *)data;
switch (ic->ic_state) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
if (ic->ic_opmode == IEEE80211_M_HOSTAP)
IEEE80211_ADDR_COPY(bssid->i_bssid,
ic->ic_myaddr);
else if (ic->ic_flags & IEEE80211_F_DESBSSID)
IEEE80211_ADDR_COPY(bssid->i_bssid,
ic->ic_des_bssid);
else
memset(bssid->i_bssid, 0, IEEE80211_ADDR_LEN);
break;
default:
IEEE80211_ADDR_COPY(bssid->i_bssid,
ic->ic_bss->ni_bssid);
break;
}
break;
case SIOCS80211CHANNEL:
if ((error = suser(curproc, 0)) != 0)
break;
chanreq = (struct ieee80211chanreq *)data;
if (chanreq->i_channel == IEEE80211_CHAN_ANY)
ic->ic_des_chan = IEEE80211_CHAN_ANYC;
else if (chanreq->i_channel > IEEE80211_CHAN_MAX ||
isclr(ic->ic_chan_active, chanreq->i_channel)) {
error = EINVAL;
break;
} else
ic->ic_ibss_chan = ic->ic_des_chan =
&ic->ic_channels[chanreq->i_channel];
switch (ic->ic_state) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
error = ENETRESET;
break;
default:
if (ic->ic_opmode == IEEE80211_M_STA) {
if (ic->ic_des_chan != IEEE80211_CHAN_ANYC &&
ic->ic_bss->ni_chan != ic->ic_des_chan)
error = ENETRESET;
} else {
if (ic->ic_bss->ni_chan != ic->ic_ibss_chan)
error = ENETRESET;
}
break;
}
break;
case SIOCG80211CHANNEL:
chanreq = (struct ieee80211chanreq *)data;
switch (ic->ic_state) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
if (ic->ic_opmode == IEEE80211_M_STA)
chan = ic->ic_des_chan;
else
chan = ic->ic_ibss_chan;
break;
default:
chan = ic->ic_bss->ni_chan;
break;
}
chanreq->i_channel = ieee80211_chan2ieee(ic, chan);
break;
#if 0
case SIOCG80211ZSTATS:
#endif
case SIOCG80211STATS:
ifr = (struct ifreq *)data;
copyout(&ic->ic_stats, ifr->ifr_data, sizeof (ic->ic_stats));
#if 0
if (cmd == SIOCG80211ZSTATS)
memset(&ic->ic_stats, 0, sizeof(ic->ic_stats));
#endif
break;
case SIOCS80211TXPOWER:
if ((error = suser(curproc, 0)) != 0)
break;
txpower = (struct ieee80211_txpower *)data;
if ((ic->ic_caps & IEEE80211_C_TXPMGT) == 0) {
error = EINVAL;
break;
}
if (!(IEEE80211_TXPOWER_MIN < txpower->i_val &&
txpower->i_val < IEEE80211_TXPOWER_MAX)) {
error = EINVAL;
break;
}
ic->ic_txpower = txpower->i_val;
error = ENETRESET;
break;
case SIOCG80211TXPOWER:
txpower = (struct ieee80211_txpower *)data;
if ((ic->ic_caps & IEEE80211_C_TXPMGT) == 0)
error = EINVAL;
else
txpower->i_val = ic->ic_txpower;
break;
case SIOCSIFMTU:
ifr = (struct ifreq *)data;
if (!(IEEE80211_MTU_MIN <= ifr->ifr_mtu &&
ifr->ifr_mtu <= IEEE80211_MTU_MAX))
error = EINVAL;
else
ifp->if_mtu = ifr->ifr_mtu;
break;
case SIOCS80211SCAN:
if ((error = suser(curproc, 0)) != 0)
break;
if (ic->ic_opmode == IEEE80211_M_HOSTAP)
break;
if ((ifp->if_flags & IFF_UP) == 0) {
error = ENETDOWN;
break;
}
if ((ic->ic_scan_lock & IEEE80211_SCAN_REQUEST) == 0) {
if (ic->ic_scan_lock & IEEE80211_SCAN_LOCKED)
ic->ic_scan_lock |= IEEE80211_SCAN_RESUME;
ic->ic_scan_lock |= IEEE80211_SCAN_REQUEST;
if (ic->ic_state != IEEE80211_S_SCAN)
ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
}
/* Let the userspace process wait for completion */
error = tsleep(&ic->ic_scan_lock, PCATCH, "80211scan",
hz * IEEE80211_SCAN_TIMEOUT);
break;
case SIOCG80211NODE:
nr = (struct ieee80211_nodereq *)data;
ni = ieee80211_find_node(ic, nr->nr_macaddr);
if (ni == NULL) {
error = ENOENT;
break;
}
ieee80211_node2req(ic, ni, nr);
break;
case SIOCS80211NODE:
if ((error = suser(curproc, 0)) != 0)
break;
if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
error = EINVAL;
break;
}
nr = (struct ieee80211_nodereq *)data;
ni = ieee80211_find_node(ic, nr->nr_macaddr);
if (ni == NULL)
ni = ieee80211_alloc_node(ic, nr->nr_macaddr);
if (ni == NULL) {
error = ENOENT;
break;
}
if (nr->nr_flags & IEEE80211_NODEREQ_COPY)
ieee80211_req2node(ic, nr, ni);
break;
case SIOCS80211DELNODE:
if ((error = suser(curproc, 0)) != 0)
break;
nr = (struct ieee80211_nodereq *)data;
ni = ieee80211_find_node(ic, nr->nr_macaddr);
if (ni == NULL)
error = ENOENT;
else if (ni == ic->ic_bss)
error = EPERM;
else {
if (ni->ni_state == IEEE80211_STA_COLLECT)
break;
/* Disassociate station. */
if (ni->ni_state == IEEE80211_STA_ASSOC)
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_DISASSOC,
IEEE80211_REASON_ASSOC_LEAVE);
/* Deauth station. */
if (ni->ni_state >= IEEE80211_STA_AUTH)
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_DEAUTH,
IEEE80211_REASON_AUTH_LEAVE);
ieee80211_release_node(ic, ni);
}
break;
case SIOCG80211ALLNODES:
na = (struct ieee80211_nodereq_all *)data;
na->na_nodes = i = 0;
ni = RB_MIN(ieee80211_tree, &ic->ic_tree);
while (ni && na->na_size >=
i + sizeof(struct ieee80211_nodereq)) {
ieee80211_node2req(ic, ni, &nrbuf);
error = copyout(&nrbuf, (caddr_t)na->na_node + i,
sizeof(struct ieee80211_nodereq));
if (error)
break;
i += sizeof(struct ieee80211_nodereq);
na->na_nodes++;
ni = RB_NEXT(ieee80211_tree, &ic->ic_tree, ni);
}
break;
case SIOCG80211FLAGS:
flags = ic->ic_flags;
if (ic->ic_opmode != IEEE80211_M_HOSTAP)
flags &= ~IEEE80211_F_HOSTAPMASK;
ifr->ifr_flags = flags >> IEEE80211_F_USERSHIFT;
break;
case SIOCS80211FLAGS:
if ((error = suser(curproc, 0)) != 0)
break;
flags = (u_int32_t)ifr->ifr_flags << IEEE80211_F_USERSHIFT;
if (ic->ic_opmode != IEEE80211_M_HOSTAP &&
(flags & IEEE80211_F_HOSTAPMASK)) {
error = EINVAL;
break;
}
ic->ic_flags = (ic->ic_flags & ~IEEE80211_F_USERMASK) | flags;
error = ENETRESET;
break;
default:
error = EINVAL;
break;
}
return error;
}
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